diff options in ports

[Marten]

Hi all,

For Wirelessleiden I am building a framework for src & ports to build
images for different i386 plaforms (pc, soekris, pcengine) different
purpusis. Nodes, proxies, dns etc etc.

I read  "the porters handbook" to find more how to use our patches 
It took me quit some time that it needs at least the option:

diff -c
or
diff -u

to make patches work in ports the it is described. To spare other people
the time to find this out it might be nice to mention this in de porters
handbook 4.4 section.

hoping to contribute,
kind regards,
Marten